Coupling for pipes or conduits.



F. W. ERICKSON. COUPLING FOR PIPES OR GONDUITSI APPLICATION FILED NOV. 22, 1910.

Patented Oct. 15, 1912.

Eig. Z.

WTVESSES.' I l 2. /f M1,

FREDERIC WM. ERICKSON, OF NEW YCRK, N. Y., ASSIGNOR T0 LORD MANUFACTURING COMPANY, OF NEW YGRK, N. Y.

COITPLING- FOR PIPES OR CONBUITS.

Specification of Letters Eatent.

Patented Got. i5, i912.

Application led November 22, 1910. Serial No. 593,611.

To all whom t may concern.'

Be it known that I, FREDERIC IVM. ERICK- soN, residing at New York, in the county of tiguousends ot' the pipes to be joined, each part being provided with interlocking means so that one part will not turn relatively to the other, and secure them together by a third part or sleeve, thus securingthe three parts to each other and to the pipes and firmly butting the ends of the pipes to ,ong another. All of which I will now procee to describe and point out in the appended claim.

In the drawings forming a part and illustrating 'this specification- Figure 1 is an elevation of a complete joint. Fig. 2 is a horizontal section of Fig. `1. Figs. 3, t and 5 are respectively top side and bottom views of one of theparts of the joint. Figs. 6 and 7 are respectively top and sectional side views oi .another portion. Figs. 8 and 9 are respectively top, and side sectional views of the sleeve portion. And Figs. 10 and 11 are side and bottom views of a wrench used in making a joint with the several parts.

In the drawings g and gare sections oi.

pipes to be joined, the opposite ends of which are squared and screw threads cut on their outer surfaces. The part dis screwed onto the end ofpipe g so that its outer end is flush with the end of the pipe, and the part l is screwed upon the end of the pipe g so that itsouter end is even with the end of the pipe. The part l is shown as having three projections f f'fffromits outer end, while the part l has three depressions c c c iny its outer end so that when the pipes are brought together the projections f f f fit into `the depressions c c c. The outer surface, as

well as the inner surface, of the part l is internally screw-threaded sleeve It. The sleeve it is internally screw-threaded for about one-half its length and when in place as ,indicated in Fig. 2 its smooth interior covers the outside oi the part CZ and at its lower end is provided with a lip a' extending about the same to engage the under side of the part d and hold it and the pipe g upward to the pipe g.

In preparing to make the joint the part 1 is screwed onto the pipe g by means of a wrench embracing'its hexagonal end @which extends over and forms a protection or a cover for the end of the sleeve 7L; and the part Z is screwed onto the end of thepipe g by means of the wrench shown in Figs. 10 and ll, one end of which is hollowed out to receive the part (Z and provided with depressions c lc 7c to engage the projections f f f on the end of al. I lind in practice if a common wrench is used to screw the part al onto a pipe it roughens its outer surface so that it is diliicult for the sleeve z to pass over it.

The sleeve 7L is preferably of light construction in order to keep down the outside diameter and have the joint as compact as possible, and if the outer surface of part d is rough there will be Greater friction between it and the sleeve The locking of the parts l and d renders it impossible for the part d to turn by reason of any friction between it and the sleeve 7L when the latter is screwed on.

I claim as my invention A pipe coupling adapted to externally connect two pipe sections with the ends of the latter abutt.ing,'said coupling comprising two pipe-engaging members and an inclosing sleeve, said pipe-engaging members having interengaging and directly abutting projections and recesses, one of said members being internally threaded and externally smooth and the' other one being both internally and externally threaded and having an enlargement at one end to be operatively engaged by a wrench, the said sleeve having an internally threaded portion to coact with the external thread of the member having the enlargement and having` an internally smooth portion and an inwardly projecting lip to surround and engage the end of the externally'smooth member, the

pipe-engaging 'members being such that Ito llength of the sleeve relatively to the two When the enlargement of one of said memname to this specification n the presence of bers is engaged by one end of the sleeve the i Lw'o subscribing Witnesses, this 16th day of lip at the other end of the sleeve' holds the November 1910.

two pipe-engaging members in endWse con- FREDERIC WVM. ERICKSON.

5 tact with their projections and recesses n- Witnesses:

terlocked. HARRIET LEVI,

In testimony whereof, I have signed myZ, JOHN A. COLE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

" Washington, D. C. 

